Which iPhone model first introduced a dual-camera system?

The iPhone 7 Plus was the first iPhone model to introduce a dual-camera system. Apple unveiled it in September 2016 with two 12-megapixel rear cameras: a standard wide-angle camera and a telephoto camera.

The second lens gave the iPhone 7 Plus 2× optical zoom, allowing users to magnify subjects with more detail than ordinary digital cropping. Apple also used the two cameras together for depth estimation, which enabled Portrait Mode to separate a foreground subject from a blurred background. This helped make dual-camera photography a defining smartphone feature.

The smaller iPhone 7, released at the same time, had only one rear camera, so the answer is specifically the “Plus” model rather than the iPhone 7 family as a whole. The iPhone 8 Plus and iPhone X also used dual-camera systems, but they came later in 2017.

The iPhone 6 Plus is another common distractor because it introduced optical image stabilization, not dual rear cameras. The iPhone 7 Plus was the actual first iPhone with two rear lenses.